RE: knockdown power... fact or myth?
Theres no caliber that can give knockdown everytime. But I do think the more shock and kinetic energy, not to mention expansion, can give better odds of a knockdown. That or shooting the spine, which should never be done on purposse IMO. Theres too many variables, but it could have something to do with whether the deer in on guard or relaxed, shot thru the shouder blades.